Means for automatically unlocking doors.



W. H. BYWATER & W. B. MORRISON. MEANS FOR AUTOMATICALLY UNLOGKING DOORS. APPLICATION FILED AUGAIZ. 1912.

1,060,317, Patented Apr.29, 1913.

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; I l I I I I I l 1 l I i l I. l I I I l l I .ITNESSES M INVENTORJ WWW/411077123 W. H. BYWATER & W. B. MORRISON. MEANS FOR AUTOMATICALLY UNLOGKING DOORS. APPLICATION FILED AUG. 12, 1912.

1,@6,3l7n Patented Apr. 29, 1913.

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[TNESSES 1% 5?; /0 INVENTORS SJ, S l J a/WA tlormy WILLIAM H. BYWATER AND WILLIAM- B. MORRISON, OF SALT LAKE CITY, UTAH.

Specification of Letters Patent.

Patented Apr. 22, 1913.

Application flled'Aug ust 12, 1912. Serial No. 714,641.

To all whom it may concern:

Be it known that we, WILLIAM BYWA- TER and WILLIAM B. MORRISON, citizens of the United States, residing at Salt Lake City,

doorsof an engine house at the instant an.

alarm is sent in, so that the doors may be swung open by spring hinges, or other automatic means, to allow of the exit'of the horses from the stalls or the engine from itshouse.

With this object in view, our invention consists in the parts and combination of parts as will be more fully described and pointed out in the claims.

In the accompanying drawings, Figure 1 is a view in elevation taken from the inside, showing our improvement applied to the doors of an engine house. Fig. 2 is a similar view of the releasing mechanism. Fig. 3 is a view of the locking bolts and their releasing spring, and Figs. 4, 5, 6 and 7 are views of several of the parts detached.

1 and 2 represent doors, the door 1- being held in its closed position by the door 2. Bothdoors are provided with spring hinges, springs, weights or other devices for'opening them after the bolt mechanism has been released, but as these features for swinging the doors open do not form any part of our invention, we have not illustrated them.

The bolt mechanism is carried by the door 2, and comprises two bolts 3 and 4, the former of which engages a keeper 5, at the top, and the bolt 4 engages a keeper 5 in the sill. Both bolts are" mounted in suitable bearings 6, and are off-set at their adjacent ends so as to ass on opposite sides'of the block 7 secure to the inner face of the door. Pivotally secured to block 7, is the lever 8, to which both bolts 3 and 4 are loosely connected, so that when the free end of said lever is moved, say -u both bolts will be withdrawn from their eepers, and when movedin the opposite direction, the bolts will be moved outwardly to engage their keepers. The bolts are automatically retracted by the spring 9 secured at one end to the door 2,

and at its opposite end-to the lever 8, and they are held in their projected or locking position by the pin 10 on lever 11 resting within a hole 12 formed in the post 13 and passing through the latter. This post 13, showndetached in Fig. 6, is secured preferably by a'threaded shank, to the plate 14, which latter carries the bearings 15 and 16 for the sliding rod 17. The rod is preferably made of steel and is mounted in bearings 15 and 16 in line with the hole 12, in post 13,- and is adapted to be moved longitudinally by the devices hereinafter described, so as to enter said hole 12 and force the pin 10 on swinging arm 11 out, thus releasing the lever and permitting the' spring 9 to swing the latter in a direction to retract the bolts.

The bearings 15 and 16 are shown detached in Figs. 4'and 6 respectively, the

bearing 15' having holes for its attachment by screws, and the bearing 16 having a threaded shank for its direct attachment to the plate 14. By providing the bearing 16 with a threaded shank, it may be readily adjusted to properly aline the rod 17 with the hole 12 in post 13. We prefer: however to make the ends of the hole 12 flaring, and the end of the rod 17 adjacent post '13 slightly tapering, so as to insure the entrance of the end of the rod 17 into the hole 12, and into contact with the pin 10, whereby the latter will be driven from the hole thus releasing the swinging arm 11 and lever 8 and permitting the spring 9 to turn the latter in a direction to retract the bolts 3 and 4.

Rigidly secured to the rod ,17 intermediate the bearings 15 and 16, is the block 18 to which the link 19 is pivotally secured, the.

opposite end of said link being pivotally attached to the block 20 rigidly secured to the lower end of spring actuated rod 21, and pivotally secured at one end" to the said block 20, and at its other end to post 22 on plate 14, is the link 22. It will therefore be seen that both links 19 and 22'are pivotally attached at their upper ends to the block '20, and one, 19, is connected at its lower end to the rod 17 and the other, 20, pivotally connected with the fixed plate 14. The block 20, is as before stated, secured to the lower end of the spring actuated rod 21, which latter is supported by the bracket 23 secured to the door, the opening in the bracket for the passage of the rod, being of a size sufficient to permit the rod to have a lateral or swinging movement, as shown in dotted lines in Fig. 2.

24 is a spring secured at its upper end to rod 21 at a point below bracket 23., and at its lower end to the plate leg-preferably in line with the long axis of rod21 When the latter is in the position-shown in dotted lines in Fig.2.

Pivotally mounted on post 25 is the latch 26, normally held in position to engage the lower end of block 18, and'hold the rod 17 in its set position, by the spring 27 This latch is the armatureyof the magnets 28' which are connected in the gong circuit in series, and when the latter are energized,

the armature; will be drawn downwardly thus releasingthe rod 17 and permitting it to be projected rapidly toward pin 10 on swinging arm 11, and push the latter free of the post' 13, thus releasing the arm. 11 and permitting spring 9 to act on lever 8 as previously explained. When the block 18 is released by the latch 26, the spring 24 "pulls the rod 21 downwardly, and as link 22 as a bearing on the fixed-plate 14, and the link 19 a bearing'on rod 17, the downward I movement of the :rod 21 straightens out the links from the position-shown in full lines tothat shown in dotted lines, and the end of the rod'coming in contact with the pin forces the latter from'its seat in the post 13,

thus permitting the spring 9 to retract the bolts. After the alarm has been sounded, the latch 26 assumes its normal position and when rod 17 is retracted by pulling back on handle 29, the shoulder on the latch again '40 engages the block and holds the rod set for the'next alarm. The arm 11 is exposed and if from any cause the rod 17 should fail to release the same it can be readily released by a pull or a kick.

It is evident that'changes in the construction and relative arrangement of the severalparts inightbe made without avoiding our invention and hence we would have it understood that we do not restrict ourselves to the particularconstruction and arrangement of parts shown and described, but,

Having fully described our invention what we claim' as new. and desire to. secure by Letters-Patent, is:

1. The combination with a door, a bolt thereon, a lever connected with the bolt .for projecting. same, means tending to retract the bolt and means for holding the lever' when'the bolt-is in its locking position, of

automatically actuated means adapted to release the actuating lever and permit theretracting means to retract the bolt.

i 2. The combina'tipn with adoor, a bolt thereon, 'a lever connected withthe bolt for actuating same, means tending to retract the bolt, and means for holding the. lever when the bolt is in its locking position, of a, longitudinally sliding rod adapted when released to disengage the lever from its holding means, means for moving the rod longitudinally, and electrically controlled means for holding the rod in its set position.

3. The combination with a door, a bolt thereon, an actuating lever for the bolt, means constantly tending to retract the bolt and means for holding the lever when the bolt is in its locking position, of 'a longitudinally sliding rod adapted when released to disengage the lever from its holding means, spring actuated'mechanism for -moving the rod longitudinally in a direction to release said lever, acombined latch and I armature for holding'said rod in its set position, and a magnet for actuatingsaid armature. Y

4,. The combination .thereon, an actuating lever. for the bolt, means constantly ;.tending' to retract the bolt,

with a door, a bolt and means for holding the lever when the bolt is in its locking position, of. a longivtudinally sliding rod adapted when released,

to disengage the lever from its holding means. a spring. actuated rod, two links pivotally connected with saidspring'actuated rod, one of said linksbeing connected with the sliding rod and the other with a fixed support, and anelectrically controlled latch adapted .to engage a shoulder on the sliding rod for holding the latter in its set position, the construction being such, that when the sliding rod is released, the power exerted thereon through the spring actuated rod andthelinks will be gradually accelerated.

5. The combination with a door, two bolts thereon, a pivoted lever'for actuating both bolts, a spring tending toretract the bolts, an arm carried by the lever and provided with apin, and a. fixed support having a hole ,to receive the. pin, whereby the bolts will be held in their locking position,,of an automatically actuated sliding rod, adapted when released to engage sa'id pin and disengage it from its support and thus release the bolt actuating lever.

. In testimony whereof, wehave signed this specification in the presence of two subscribng witnesses.

Witnesses .NDREW EIKREM, CHASE. SMITH. 

